<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div class="main-container" id="main" style="width:99%">
    <iframe src="aa.html" width="100%" height="100%" frameborder="0">
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    </iframe>
</div>

</body>
</html>